Lukning af popupvindue

Hvordan får jeg dette popup vindue til at lukke når jeg trykker på knappen?

class Main
{
    public static void main(String args[])
    {
          new TestKlasseSwing().show();
    }
}


import javax.swing.*;
import java.awt.*;

public class JPop extends JDialog
{
    public JPop(Frame owner, String title, int x, int y)
    {
    super(owner, title);
    this.setSize(200, 200);
    this.setLocation(x, y);
    String tekst = "x: " + x + " y: " + y;
    reol reol = new reol();
    //JLabel label = new JLabel(tekst);
    this.getContentPane().add(reol);
    this.show();
    }
}


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class reol extends JPanel
{                               
                   
                    JButton                lukButton;
               
    public reol()
    {
    setLayout(null);

    setBorder(BorderFactory.createTitledBorder("popup"));
   
    lukButton         = new JButton("luk");
   
    add(lukButton);
   
    Insets insets = getInsets();

    lukButton.setBounds                 ( 20 + insets.left, 20 + insets.top, 100, 60);
   
   
   
    lukButton.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
              {
            //???   
              }
       
        }
        );
    }    public Dimension getPreferredSize()
    {
   
    return new Dimension(800, 500);
    }
}


import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class TestKlasseSwing extends JFrame implements WindowListener, MouseListener
{
    private int frameWidth = 640;
    private int frameHeight = 480;
   
    public TestKlasseSwing()
    {
        createFrame();
    }
   
    private void createFrame()
    {
        setTitle("TestKlasseSwing");
        setResizable(false);
        addWindowListener(this);
        addMouseListener(this);
   
        //Center Frame
        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setSize(new java.awt.Dimension(frameWidth, frameHeight));
        //setLocation( (screenSize.width-this.getWidth()) / 2, (screenSize.height - this.getHeight()) / 2);
    }

    public void windowOpened(WindowEvent e){}
    public void windowClosing(WindowEvent e){ dispose(); System.exit(0);}
    public void windowClosed(WindowEvent e){}
    public void windowIconified(WindowEvent e){}
    public void windowDeiconified(WindowEvent e){}
    public void windowActivated(WindowEvent e){}
    public void windowDeactivated(WindowEvent e){}
   
    public void mouseReleased(MouseEvent e){}
    public void mousePressed(MouseEvent e){}
    public void mouseExited(MouseEvent e){}
    public void mouseEntered(MouseEvent e){}
    public void mouseClicked(MouseEvent e)
    {
    new JPop(this, "MyPop", e.getX(), e.getY());
    }
}